Zoology - Neural Control and Coordination Question with Solution | TestHub

The resting state is polarized state. This contains sodium extracellularly while potassium ions are present inside the axons. As impulse arrives Sodium channels open and thus there is influx of sodium. This is state of action potential or depolarization. This continues for only$0.5$msec after which potassium channels open and sodium channels close. This causes efflux of potassium and this is known as repolarization.